Update Dockerfile

Dockerfile

@@ -11,14 +11,13 @@ RUN apt-get update && apt-get install -y \
     g++ \
     && rm -rf /var/lib/apt/lists/*
 
-# Upgrade pip and install build tools FIRST
-RUN pip install --no-cache-dir --upgrade pip setuptools wheel cython
-
-# Install legacy setup.py packages separately with --no-build-isolation
-# This bypasses the pkg_resources isolation bug that affects packages
-# using old-style setup.py builds (openai-whisper and python-pesq)
-RUN pip install --no-cache-dir --no-build-isolation openai-whisper==20231117
-RUN pip install --no-cache-dir --no-build-isolation https://github.com/ludlows/python-pesq/archive/master.zip
+# CRITICAL: setuptools>=81 removed pkg_resources.
+# Pin to <81 so legacy setup.py packages (openai-whisper, python-pesq) can build.
+RUN pip install --no-cache-dir "setuptools<81" wheel cython
+
+# Install legacy packages that use old-style setup.py with pkg_resources
+RUN pip install --no-cache-dir openai-whisper==20231117
+RUN pip install --no-cache-dir https://github.com/ludlows/python-pesq/archive/master.zip
 
 # Copy and install remaining requirements
 COPY requirements.txt .